Notifier 1451 4-Wire User Manual
1451
2-Wire and 4-Wire
Ionization Smoke Detector
General
The System Sensor 400 Series plug-in ionization smoke
detectors respond quickly to both fast flaming and slow smoldering fires as required by UL 268. Unipolar dual chamber
sensor has the sensitivity needed to quickly detect smoke, and
the stability needed to avoid false alarms.
Features
• Unique dual unipolar sensor:
– Provides exceptional stability.
– Factory preset at 1.9% nominal sensitivity.
– Stable operation up to 1,200 feet per minute (6 meters per
second) air velocities.
• Removable cover for field cleaning.
• Two visible LEDs “blink” in standby.
• Sealed against dirt, insects, and back pressure.
• Three-year limited warranty.
• Field metering of detector sensitivity.
• Built-in test switch.
• Low standby current.
• Built-in tamper-resistant feature.
• Designed for direct surface or electrical box mounting.
• 360° field viewing angle of the visual alarm LEDs.
• Insect-resistant screening (0.020"/0.508 mm openings).
• Easy plug-in of the head to base.
• SEMS screws for easy wiring.
• Optional recess mounting.
• Field-adjustable sensitivity.
Applications
Use to contribute to life safety, fire protection, and property
conservation. Superior to photoelectric detectors in detecting
fast-flaming fires. Superior to bipolar detectors in avoiding
false alarms.
Construction & Operation
All 400 Series plug-in ionization smoke detectors contain a
unique dual-source, dual unipolar chamber detection design
which will sense the presence of smoke particles produced by
fast combustion as well as slow smoldering fires. Additional
key features include a blinking LED standby status indicator,
an easily visible alarm indication, and provision for convenient
field test and metering.
The back of the detector is sealed to block back-pressure air
flow. The chamber is protected by a fine mesh (0.020"/0.508
mm) screen to minimize problems with dust, dirt, and insects.
If cleaning is required, it is easy to remove the cover (with a
special tool) and obtain access to the screen and chamber to
perform a thorough cleaning.
Installation
Model 1451 detectors are intended for use with Notifier ULlisted control panels. Maximum number of detectors per zone
is listed in the installation manual for each control panel. Easy
DN-1154:A • I-110
Conventional Initiating Devices
1154pho.jpg
1451
Ionization Detector shown with B401B Base
to install and maintain, this detector is designed for direct surface mounting (using one of the B400 Series bases listed
below). Easy-to-wire screw terminals allow fast and simple
field wiring of IN, OUT, and remote annunciator connections.
Consult Notifier control panel specifications for the maximum
allowable loop resistance for the particular control panel to be
used.
To prevent wiring mistakes, observe polarities and make certain that each conductor is identifiable. A copy of Installation
and Maintenance Instructions is packaged with each detector. For further information, refer to NFPA 72 “Standard on
Automatic Fire Detectors.”
A Mounting Base Selection Guide is included on page 2 of
this document.
Junction Box Selection Guide: Box depth is contingent on
base and wire size. Refer to National Electrical Code or local
applicable codes for appropriate recommendations. Bases
B401 and B401B can utilize a single-gang, 3-1/2" (88.9 mm)
octagonal, 4" (101.6 mm) octagonal, or 4" square junction box.
Bases B402B and B406B can utilize a single-gang, 3-1/2"
octagonal, 4" octagonal, 4" square, 50 mm, 60 mm, or 75 mm
junction box. Base B404B can utilize a 4" octagonal or 4"
square junction box.
General Specifications
Operating voltage: mounting base dependent (see chart
below).
Standby current: 120 micro amps.
Sensitivity: 1.9% nominal.
Weight: 0.6 pounds (272 grams).
Size: 3.2" (81.28 mm) high; 4.0" (101.6 mm) diameter with
unflanged bases, or 6.2" (157.48 mm) diameter with flanged
bases.
Construction: Flame-retardant white Noryl® plastic.
Temperature: 32°F to 120°F (0°C to 49°C).
DN-1154:A • 6/4/08 — Page 1 of 4
Humidity range: 10 to 93% R.H. (non-condensing).
Maximum air velocity: 1,200 feet per minute (6 meters per
second).
Agency Listings and Approvals
These listings and approvals apply to the modules specified in
this document. In some cases, certain modules or applications
may not be listed by certain approval agencies, or listing may
be in process. Consult factory for latest listing status.
• UL Listed: S911
• ULC Listed: S911 (1451A)
• MEA Listed: 427-91-E Vol. III
• FM Approved
• CSFM: 7271-1653:108
• BSA: 1202-88-SA
• Maryland State Fire Marshal Certificate: #2185
Product Line Information
1451: Ionization Detector. Must be mounted to one of the
B400 Series Bases listed below.
RA400Z: Remote Annunciator for 2- or 4-wire applications.
Use with any System Sensor 400 Series plug-in detector. Fits
standard U.S. single-gang electrical box.
MOD400R: Field Test module for all of the System Sensor
400 Series Smoke Detectors.
B401(B) Wiring Diagram
B402B Wiring Diagram
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5578d4.wmf
5578d3.wmf
B406B Wiring Diagram
B404B Wiring Diagram
Mounting Base Selection Guide
Base
Model
Number
Version
Loop
Type
(A)
B401 &
B401B (A)
B402B (A) UL & ULC 4-wire Yes Form-A & -C 24 VDC
B404B (A) UL & ULC 4-wire Yes
B406B (A)
* Functionality contingent on panel compatibility.
** Must be limited by control panel.
Relay Contact Ratings: Resistive or Inductive (60% power factor load). Form-a: 2.0A at 30VAC/DC.
Form-C: 0.6A at 110VDC, 2.0A at 30VDC, 1.0A at 125 VAC.
(A) = ULC model designation.
UL/ULC/
EN-54
UL/ULC/
EN-54
2-wire* No - 12/24 VDC
2-wire* No Form-C 24 VDC
Current
Limit
Resistor
Alarm
Contact
Type
Form-A & -C/A
Supervisory
Nominal
Voltage
120 VAC 120 VAC
Standby
Voltage
8.5 to 35
VDC
17 to 32
VDC
15 to 32
VDC
Current
Draw on
Alarm
10 to 100
mA**
14 to 39
mA
75 mA AC
maximum
12 to 100
mA**
5578d2.wmf
Location of
holes to
access and
release
locking
prongs.
Cover and
screen are
removable
for cleaning.
Locking
prongs.
1154d1.tif
Page 2 of 4 — DN-1154:A • 6/4/08
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